ASTM A574M-04e1

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Designation: A 574M – 04
Standard Specification for
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Alloy Steel Socket-Head Cap Screws (Metric)
This standard is issued under the fixed designation A 574M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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e NOTE—Sections 2.2 and 3.2.8 were editorially revised in October 2006.
1. Scope* F 788/F 788M Specification for Surface Discontinuities of
Bolts, Screws, and Studs, Inch and Metric Series
1.1 This specification covers the requirements for quenched
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2.2 ASME Standards:
and tempered alloy steel socket-head cap screws 1.6 mm
B18.3.1M Metric Socket Head Cap Screws
through 48 mm in diameter having a minimum ultimate tensile
B18.24 Part Identifying Number (PIN) Code System Stan-
strength of 1220 MPa.
dard for B18 Fastener Products
NOTE 1—This specification is the metric companion of Specification
A 574.
3. Ordering Information
1.2 The following hazard caveat pertains only to the test
3.1 Orders for socket head cap screws under this specifica-
method portion, Section 10, of this specification: This standard
tion shall include the following information:
does not purport to address all of the safety concerns, if any,
3.1.1 Quantity (number of screws),
associated with its use. It is the responsibility of the user of this
3.1.2 Dimensions, including nominal thread designation,
standard to establish appropriate safety and health practices
thread, pitch, and nominal screw length (millimetres),
and determine the applicability of regulatory limitations prior
3.1.3 Name of the screw (SHCS),
to use.
3.1.4 ASTM designation and year of issue.
3.2 Orders for socket head cap screws may include the
2. Referenced Documents
following optional requirements:
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2.1 ASTM Standards:
3.2.1 Inspection at point of manufacture.
A 751 Test Methods, Practices, and Terminology for
3.2.2 Coating, if required (see 4.6).
Chemical Analysis of Steel Products
3.2.3 Certified Test Reports (see 9.2).
D 3951 Practice for Commercial Packaging
3.2.4 Additional Testing (see 9.3 and 11.1).
E3 Guide for Preparation of Metallographic Specimens
3.2.5 Special Packaging (see 14.1.2).
E18 Test Methods for Rockwell Hardness of Metallic
3.2.6 Supplementary Requirement (see S1).
Materials
3.2.7 Special Requirements.
E112 Test Methods for Determining Average Grain Size
3.2.8 For establishment of a part identifying system, see
E 384 Test Method for Microindentation Hardness of Ma-
ASME B18.24
terials
4. Materials and Manufacture
F 606M Test Methods for Determining the Mechanical
Properties of Externally and InternallyThreaded Fasteners,
4.1 The screws shall be fabricated from steel made to fine
Washers, and Rivets [Metric]
grain practice. In the event of controversy over grain size,
referee tests on finished screws conducted in accordance with
Test MethodsE112 shall prevail.
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This specification is under the jurisdiction of ASTM Committee F16 on
4.2 ScrewsinsizesuptoM20inclusive,andwithlengthsup
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
to ten times the nominal product size or 150 mm, whichever is
Nuts, Rivets and Washers.
shorter, shall be cold headed, except that they may be hot
Current edition approved Aug. 1, 2004. Published August 2004. Originally
approved in 1980. Last previous edition approved in 2000 as A 574M–00.
headed by agreement of the purchaser. Larger sizes and longer
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from American Society of Mechanical Engineers (ASME), ASME
the ASTM website. International Headquarters, Three Park Ave., New York, NY 10016-5990.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A574M–04
TABLE 2 Chemical Requirements
lengthsmaybecoldorhotheaded.ScrewsM42andlargermay
be machined. Sockets may be forged or machined at the option
Element Composition, %
of the manufacturer.
Heat Analysis Product Analysis
4.3 ScrewsinsizesuptoM24inclusive,andproductlengths
Carbon 0.33 to 0.48 0.31 to 0.50
up to 150 mm inclusive, shall be roll threaded, except by
Phosphorus, max 0.035 0.040
special agreement of the purchaser. Larger products may be
Sulfur, max 0.040 0.045
rolled, cut, or ground at the option of the manufacturer.
Alloying
...